Collection: Apex Case Material: Stainless steel 316L Case Size: 41 mm Strap Material: black Italian vegetal tanned leather strap, Stainless steel buckle, quick spring release bars Strap Size: 20 mm Hands: Matte white with Super-LumiNova Dial: Vertically brushed metal plated layered sandwich dial with white Super Luminova numbers and markers Crystal: Double domed sapphire crystal with AR coating Movement: Kronaby connected movement BT003, one sub-dial, Bluetooth 5.0 Low Energy (BLE), vibration motor, accelerometer Battery: Battery Life up to 2 years (depending on use), CR3032 coin cell APP: Kronaby App working with (or later version) Android 5.0 and iOS 9 Water Resistant: 10 bar/ 100 metres